Update README.md

Author: h-brough

README.md

@@ -8,7 +8,7 @@
 
 Welcome to TUNA! A user-friendly quantum chemistry program for diatomics. 
 
-The program contains a collection of quantum chemistry methods, and considerable effort has been taken to document everything. The accompanying manual provides numerous examples and explanations for how TUNA works.
+The program contains a collection of quantum chemistry methods, and considerable effort has been taken to document everything. The manual provides numerous examples and explanations for how TUNA works.
 
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 <p align="center"><img src="https://raw.githubusercontent.com/h-brough/TUNA/9dd6ad4a5705cd38ffa64add120b2296aa9068ce/TUNA%20Logo.svg" alt="Fish swimming through a wavepacket." width=480 /></p>